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IB/mthca: Make fw_cmd_doorbell default to 0 

Setting fw_cmd_doorbell allows FW command to be queued using posted
writes instead of requiring polling on a "go" bit, so it should be a
performance boost.  However, the option causes problems with at least
some device/firmware combinations, so set the default to 0 until we
understand what's going on better.

Signed-off-by: Roland Dreier <rolandd@cisco.com>
hifive-unleashed-5.1
Roland Dreier 2006-05-17 07:48:07 -07:00
parent 032ebf2620
commit 1db76c14d2
1 changed files with 1 additions and 1 deletions
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2
drivers/infiniband/hw/mthca/mthca_cmd.c
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@ -182,7 +182,7 @@ struct mthca_cmd_context {
u8 status;
};
static int fw_cmd_doorbell = 1;
static int fw_cmd_doorbell = 0;
module_param(fw_cmd_doorbell, int, 0644);
MODULE_PARM_DESC(fw_cmd_doorbell, "post FW commands through doorbell page if nonzero "
"(and supported by FW)");